Automatic carburetor adjustment



W.,J. SHORT AUTOMATIC CARBURETOR ADJUSTMENT Filed June 26, 1923 Patented .Feb. 23, 1926.

WILLIAM J. SHORT, or I-IEBER srrmves, ARKANSAS.

AUTOMATIC CARBURETCR ADJUSTMENT.

Application filed. June 26, 1923. Serial No. 647,855.

To all whom it may concern:

Be it known that I, IVILLIAM J .Snon'r, re-.

siding at Heber Springs, Arkansas, a citizen of the United States, have invented certain new and useful Improvements in Automatic Carburetor Adjustments, of which the following is a specification.

The object of my invention is to provide means for the automatic regulation of the supply of fuel to the carburetor of an explosive engine which willregulate the quantity to suit the engine temperature which will be efficient, simple of construction and convenient of application to the engine. By my invention the temperature of the exhaust gases in passing through the exhaust determines the quantity of fuel supplied to the carburetor by automatically turning the needle valve of the carburetor. My invention consists in whatever is described by or is included within the terms or scope of the appended claims.

In the annexed drawings:

Fig. 1 is a plan view illustrating an embodiment of my invention;

Fig. 2 is a perspective view illustrating another embodiment; v

Fig. 3 is a detail view in perspective of the means for connecting the valve turning devices therewith,

In the embodiment of my invention shown in Fig. 1 I utilize the longitudinal expansion and contraction of the exhaust pipe due to the passage of the exhaust gases therethrough to impart movement to a connection between the pipe and needle valve. Such connection comprises a pair of parallel rods, 10, which extend from front to rear of the car which at their front ends are respectively attached to the stem, 11, of the needle valve on 0-1)- posite sides of the center thereof and at their rear ends are connected to a lever, 12, pivoted between the rods to an arm, 13, secured to the chassis, 141:, so that by the rocking of-said lever one rod will be moved forward and the straddles the valve stem having a horizontal p -"tie; abeve the t t-n e he d f he ee to which the rods are attached and having downwardly extending legs which are clamped to the valve stem by means of a bolt, 17, which connects the legs on one side the stem, the legs on the opposite side of the stem being secured together by a hook and hole connection, 17 it being an inexpensive and easily applied turning device for the stem. For adjustment purposes the horizontal top of the yoke is provided with several holes, 16 of graduated distances from the center of the valve which permit shifting of the connection between the rods and the yoke to vary the amount of turning the valve. i

In the embodiment of my invention shown in Fig. 2 instead of having the rod arrangement which is connected with the needle valve directly connected with the ex haust pipe E" and directly moved by the latter I connect the lever, 120, correspond-- ing with the lever, 12, with a bar, 18, that is in contact therewith, or lies close enough to be heated therefrom and which at its forward end is secured to the exhaust pipe, being free therefrom at all other points of its length so that it may be free to expand and contract longitudinally and thereby to rock the lever, 120, and through the rods, 1.00, rotate the needle valve. It may be clamped at its forward end by a bolt, 1%), passing through lugs that straddle the exhaust pipe, and preferably is loosely supported at its rear end by lugs, 20, that straddle such pipe. Said bar, 18, is in effect a part of the exhaust pipe but it affords an advantage over using the exhaust pipe in that changes of length under changes of temperature are slower because it heats up more slowly than the exhaust pipe does and does not so quickly reduce the gasoline feed, with the danger of reducing the feed before the engine has heated up to a point where it can run on the minimum of gasoline.

It will be seen that by utilizing the t6111- perature of the exhaust gases as I do the mechanism involved is very simple, it is easily applied and is out of the way so that it does not interfere with work on the engine. A very important advantage in using exhaust gases is that the temperature thereof is more constant or uniform, that is to say, it is not exposed to conditions which will vary it, such for example as those which exist Where a thermostat is plaoedadjacent th s er within th tees-tease i a to which the thermostat vis exposed and,

hence, the temperature to which the thermostat is exposed may not hare a. direct relation to the engine temperature, and the action will not be as dependable as with invention.

What I claim is:

1. The combinationofa carbua'et'oi valve and the pipe extending "from the exhaust manifold of an inteimal combustion engine, sueh pipe: being freeto. movelongitudinally under temperatiu e changes due to exhaust gases passing through such pipe, :1; 'devi ee connected with and partaking of. such longttudinal movement of: said pi e, the point of connection between said device and thezp-ipe being a substantial distance from the" exhaust manifold and the carburetor" valve,

and an operativeconnection between said signature.

device and the carburetor nilre for trans mitting to.- the valve the lfongitudri-nail movementof the exhaust pipe.

2.- The combination of a carburetor Valve and the exhaust pipe of an internal combustion engine, sueh. exhaust pipe being free to move longitudinally under temperature changes due to: exhaust gases passing through such pipe, a device connected with and partaking of such longitudinal movementot the exhaust pipe, the point oi? con-- nection between said device and exhaust pipe being a substantialdistance from the carburetor valve, and an operative connection between said device and the carburetor valve for transmitting" to the valve the longi tudinal movement of the exhaust pipe, such connection situated to be substantially il'rra'tfeeted by heat from; the exhaust pipe;

In testimony whereof I hereunto afii x iny WILLIAM J. sieoe'r, 

